Shimano GRX WH-RX180 700c Wheelset Value-packed, gravel-ready. The Shimano GRX WH-RX180 Wheelset is a value-packed gravel wheelset for riders who demand advanced features, expertly engineered design, with the durability and versatility needed for all types of gravel and bikepacking. This new wheel features a 25mm internal rim width, optimized for gravel tires ranging from 32-50mm to create the ideal tire shape, all with full tubeless compatibility. The WH-RX180 also features a redesigned hub platform, using a new pawl freehub mechanism for solid engagement, long-lasting durability, and the ability to switch freehubs to accommodate MICRO SPLINE and HG spline L freehub types, giving riders the freedom to run their preferred drivetrain on any surface they choose. Features Alloy rim construction with a fully-featured, hooked tubeless rim design25mm internal rim width gives gravel tires ranging from 32-50mm wide an ideal tire shape for all types of off-pavement riding Updated hub system with a new pawl freehub mechanism for durability and the freedom to change freehubs to accommodate different cassette types SPECIFICATIONSWheel Size700c Rim Material Alloy Inner Width25mm Valve Type Presta Tubeless Yes Tire Type Clincher, Tubeless Brake Compatibility Centerlock Disc Front Axle100x12mm Rear Axle142x12mm Intended Use Gravel, All-Road Approximate Weight N/A | Shimano | Grx Wh-Rx180 700C Wheelset 100/142Mm Cl Micro Spline | Aluminum